Hadr02/src/PrimaryGeneratorAction.cc

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0025 //
0026 /// \file PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the PrimaryGeneratorAction class
0028
0029 /////////////////////////////////////////////////////////////////////////
0030 //
0031 // PrimaryGeneratorAction
0032 //
0033 // Created: 31.01.03 V.Ivanchenko
0034 //
0035 // Modified:
0036 // 04.06.2006 Adoptation of hadr01 (V.Ivanchenko)
0037 // 16.11.2006 Add option allowing to have user defined beam position (VI)
0038 //
0039 ////////////////////////////////////////////////////////////////////////
0040 //
0041
0042 #include "PrimaryGeneratorAction.hh"
0043
0044 #include "HistoManager.hh"
0045
0046 #include "G4Event.hh"
0047 #include "G4ParticleGun.hh"
0048 #include "G4SystemOfUnits.hh"
0049
0050 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0051
0052 PrimaryGeneratorAction::PrimaryGeneratorAction()
0053   : G4VUserPrimaryGeneratorAction(), fParticleGun(0), fHisto(0)
0054 {
0055   fParticleGun = new G4ParticleGun(1);
0056   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
0057   fHisto = HistoManager::GetPointer();
0058 }
0059
0060 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0061
0062 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0063 {
0064   delete fParticleGun;
0065 }
0066
0067 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0068
0069 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* event)
0070 {
0071   if (event->GetEventID() == 0) {
0072     if (fHisto->DefaultBeamPosition()) {
0073       G4double zVertex = -(5.0 * mm + fHisto->Length());
0074       fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., zVertex));
0075     }
0076   }
0077   fParticleGun->GeneratePrimaryVertex(event);
0078 }
0079
0080 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......